Evolution Engines 52NX - Manual (Page 6)

Starting the Evolution Engine (cont.)
Glow Plug
The Evolution Engine comes with a specially
designed “Super Plug” that prevents idle and
transition flameouts. The plug’s unique shape
directs incoming fuel/air mixture away from the
plug element. When replacing the plug, be sure
to replace it with another Hangar 9 Super Plug
(HAN3006).
Starting the Engine
Step 1. Fill the tank with the above-mentioned
15% to 30% fuel.
Step . Reattach the fuel lines, making sure the
vent and clunk line are attached to the fuel
nipple and the muffler pressure nipple.
Step . Close the throttle to the idle position
and have a helper hold your helicopter
and blades.
Step . Attach the glow driver.
Step . Turn the engine over using an electric starter
with a starter shaft. The engine should fire
within seconds of applying the starter.
Step 6. Allow the engine to idle for 30 seconds. Adjust the
throttle trim if necessary to achieve a constant
slow idle.
Needle Valve Adjustment
Start the engine and check the idle. Adjust as
needed.
Lift the helicopter into a hover and check for the
correct rotor rpm recommended by the helicopter
kit manufacturer. Once this is done take note of
the amount of smoke being produced by the muffler.
The mixture is correct for hover when there is a
steady stream of smoke being produced.
Land the helicopter for approximately 20-30
seconds. Lift the helicopter into a hover again
taking note of the transition from idle to hover.
If the engine exhibits a large amount of smoke
and the throttle response is sluggish, you will need
to adjust the idle needle leaner to achieve a smooth
transition. If the engine detonates and the smoke
is inconsistent or a small amount is produced, the
mixture is too lean.
The high-speed needle refines the fuel mixture
for forward flight without affecting the hovering
adjustment.
After the engine is started and warmed up, lift off
into a hover and check that the engine is running
smooth with a good trail of smoke. If everything is
fine, open the throttle and enter forward flight. Take
note of the amount of smoke as you did in the hover
adjustment. It is correct when you see noticeably
steady smoke trail. Adjust the high-speed needle
valve to obtain slightly rich but consistent setting.
Stopping the Engine
Fully close the throttle barrel to stop the engine.
Prior to putting your helicopter away for the day,
pull off the fuel line from the tank to the carburetor,
then start the engine and let it burn off all the
trapped fuel inside the carburetor and the engine.
If you do not plan to run the engine for a time, use
after run oil and squirt into the carburetor, use your
electric starter to turn over the engine for a few
seconds to let the oil coat the inside of the engine.
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